CVE-2021-29508

CRITICAL

asynkron Wire - Deserialization of Untrusted Data via Surrogate Type Handling

Title source: llm
STIX 2.1

Description

Due to how Wire handles type information in its serialization format, malicious payloads can be passed to a deserializer. e.g. using a surrogate on the sender end, an attacker can pass information about a different type for the receiving end. And by doing so allowing the serializer to create any type on the deserializing end. This is the same issue that exists for .NET BinaryFormatter https://docs.microsoft.com/en-us/visualstudio/code-quality/ca2300?view=vs-2019. This also applies to the fork of Wire.

References (2)

Core 2
Core References
Exploit, Third Party Advisory x_refsource_confirm
https://github.com/AsynkronIT/Wire/security/advisories/GHSA-hpw7-3vq3-mmv6
Third Party Advisory x_refsource_misc
https://www.nuget.org/packages/Wire/

Scores

CVSS v3 9.1
EPSS 0.0045
EPSS Percentile 63.9%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H

Details

CWE
CWE-502
Status published
Products (2)
asynkron/wire
nuget/Wire 0NuGet
Published May 11, 2021
Tracked Since Feb 18, 2026